G - Physics – 11 – B
Patent
G - Physics
11
B
352/29.11
G11B 5/00 (2006.01) G11B 5/52 (2006.01)
Patent
CA 1092237
GUIDE DRUM APPARATUS IN A MAGNETIC RECORDING AND/OR REPRODUCING APPARATUS ABSTRACT OF THE DISCLOSURE A guide drum apparatus includes a stator plate having armature windings fixedly mounted on a surface thereof perpendicular to the axis of a center shaft. Rotary magnets are fixedly supported by the center shaft on a plane perpendicular to the axis of the center shaft and face the armature windings so that the magnetic fluxes from the armature windings cause the rotary magnets to rotate according to the operational principle of a brushless d.c. motor. A stationary hollow cylindrical drum coaxially and rotatably mounts the center shaft. A rotary hollow cylindrical drum is coaxially and fixedly mounted on the center shaft and has a rotary head fixedly mounted at an outer peripheral surface thereof. The outer surfaces of the stationary and the rotary drums are arranged on the same cylindrical surface to form a magnetic tape guiding surface, and the hollows of the stationary and the rotary drums form a contiguous bore containing all of the rotary magnets, the armature windings and a rotary transformer therein. This guide drum apparatus can be made compact it size and yet can smoothly rotate the rotary head without disturbing the signals on the magnetic tape.
289551
Koda Minoru
Shioyama Tadao
Fetherstonhaugh & Co.
Matsushita Electric Industrial Co. Ltd.
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